1250-1300; Middle English from Latin: merus "pure, unmixed, bare, naked, true, real, genuine, clear, bright"; Old French: mier "pure", "entire, total, complete"; from Proto-Indo-European *mer- "to gleam, glitter, sparkle"; Old English: amerian "to purify"; Sanskrit: maricih "ray, beam"; Greek: marmarein "to gleam, glimmer"
Old English: mere "sea, ocean; lake, pool, pond, cistern," from Proto-Germanic: *mari (cf. Old Norse: marr, Old Saxon: meri "sea," Middle Dutch: maer, Dutch: meer "lake, sea, pool," Old High German: mari, German: Meer "sea"; Gothic: marei "sea," mari-saiws "lake"), from Proto-Indo-European: *mori- "sea" (cf. Latin: mare, Old Church Slavonic: morje, Russian: more, Lithuanian: mares, Old Irish: muir, Welsh: mor "sea"; Gaulish: Are-morici "people living near the sea")
The origins of mere as a noun strike a close resemblance to the origins of "haff". I suggest you click the link and see for yourself. Mere also bears an uncanny similarity to Ameer. Also, check out our post "What is a Moor?" to see what I mean.
Just from connecting a few simple dots I can see that Mere/Moor is a being from heaven (The Most High Seas) sent forth to shine bright and purify the world.